Northern Prairie Wildlife Research Center
| Table 16. Ducklings and goslings produced from monitored nests in the Waubay study area, Day County, South Dakota, 1992-1993. | ||||||||
| Species | Avg. Clutch Size |
(min-max)a | 1992 | 1993 | 1992-93 | |||
| n | No. eggs hatched |
n | No. eggs hatched |
n | No. eggs hatched |
|||
| Over water | ||||||||
| Mallard | 7.9 | (05-11) | 6 | 47 | 1 | 10 | 7 | 57 |
| Redhead | 10.6 | (06-14) | 17 | 132 | 11 | 68 | 28 | 200 |
| Canvasback | 8.8 | (06-11) | 1 | 6 | 9 | 29 | 10 | 35 |
| Ruddy duck | 8.1 | (05-13) | 1 | 7 | 6 | 42 | 7 | 49 |
| Subtotal | 25 | 192 | 27 | 149 | 52 | 341 | ||
| Upland | ||||||||
| Mallard | 7.9 | (04-13) | 1 | 6 | 0 | 0 | 1 | 6 |
| Gadwall | 8.7 | (08-09) | 0 | 0 | 1 | 8 | 1 | 8 |
| Blue-wing teal | 10.1 | (08-12) | 4 | 40 | 3 | 31 | 7 | 71 |
| Subtotal | 5 | 46 | 4 | 39 | 9 | 85 | ||
| Total | 30 | 238 | 31 | 188 | 61 | 426 | ||
| Others Canada gooseb |
6.1 | (06-07) | 7 | 36 | 7 | 36 | ||
| a Minimum and maximum
clutch sizes observed. b Nests were only recorded and monitored during 1993. |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/waubay/tab16.htm
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